@misc{indiciaebc30705ccacd,
  title = {Geologic map of Rocky Mountain National Park and vicinity, Colorado},
  author = {W. A. Braddock and J. C. Cole},
  year = {1990},
  doi = {10.3133/i1973},
  url = {https://pubs.usgs.gov/publication/i1973},
  note = {Source identifier: i1973}
}